<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../../assets/head.jpg" alt />
        <span>科大智能运维平台</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 左侧边菜单区域 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单 -->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id" v-for="item in menulist" :key="item.id">
            <!-- 一级菜单模板 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="item.icon"></i>
              <!-- 文本 -->
              <span>{{item.name}}</span>
            </template>
            <!-- 二级子菜单 -->
            <el-menu-item :index="'/' + subItem.jump" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/' + subItem.jump)">
              <!-- 二级菜单模板 -->
              <template slot="title">
                <!-- 图标 -->
                <i :class="subItem.icon"></i>
                <!-- 文本 -->
                <span>{{subItem.name}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体区域 -->
      <el-container>
        <el-main>
          <!-- 路由占位符 -->
          <router-view></router-view>
        </el-main>
        <!-- 底部版权区域 -->
        <el-footer>版权信息</el-footer>
      </el-container>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menulist: [],
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  methods: {
    // 退出登录
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 获取所有的菜单
    async getMenuList () {
      const { data: res } = await this.$http.get('/ioms-system/api/system/resources/menulist')
      if (res.code !== 20000) {
        return this.$message.error(res.message)
      }
      this.menulist = res.data
      console.log(this.menulist)
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}

.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}

.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}

.el-main {
  background-color: #eaedf1;
}

.el-footer {
  background-color: #373d41;
  width: 100%;
}

.iconfont {
  margin-right: 10px;
}

.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
